UMTS is a 3G mobile communication system that allows broadband transmission of text, voice, video and multimedia at data rates up to 2 Mbps. It was developed by 3GPP to provide a single worldwide standard for mobile devices. UMTS uses WCDMA technology and has two modes - FDD and TDD. It defines various logical, transport and physical channels to transmit data and control information between the user equipment, UTRAN network and core network elements like RNC, Node B, SGSN and GGSN. UMTS provides higher bandwidth and new services like video calls compared to previous 2G systems.

1. UNIVERSAL MOBILE TELECOMMUNICATION
SYSTEM (UMTS)

2. • PRESENTED TO:
MA’AM SAMRAH
• PRESENTED BY:
AYESHA ASIM 2021110009
FIZA IMRAN 2021110014
HIBA AZIZ 2021110019
MUBARRAH MUZAFFAR 2021110036
TAYYABA MEHMOOD 2021110052

3. INTRODUCTION
• UMTS is developed by 3GPP (3 Generation Partnership Project) a joint venture of
several organization
• 3G UMTS is a third-generation (3G): broadband, packet-based transmission of text,
digitized voice, video, multimedia at data rates up to 2 Mbps
• Also referred to as wideband code division multiple access(WCDMA)
• Allows many more applications to be introduce to a worldwide.
• Also provide new services like alternative billing methods or calling plans.
• The higher bandwidth also enables video conferencing or IPTV.
• Once UMTS is fully available, computer and phone users can be constantly attached
to the Internet wherever they travel and, as they roam, will have the same set of
capabilities.

4. PURPOSE
• The Dream was that 2G and 2.5G systems are incompatible around the world.
-Worldwide devices need to have multiple technologies inside of them, i.e. tri-band
phones, dual-mode phones
• To develop a single standard that would be accepted around the world.
-One device should be able to work anywhere.
• Increased data rate.
- Maximum 2048Kbps

5. FEATURES
• It uses FDD/TDD duplexing method.
• It uses the Bandwidth of 5 MHz.
• The Chip rate is about 3.84 Mbps.
• The Frame length unit is 10 ms.
• It uses BPSK for uplink and QPSK for downlink.

6. UMTS MODES
It has two modes.
UMTS-FDD ii) UMTS-TDD.
• In frequency division duplex mode there are two
frequencies used one for the uplink and the other
for the downlink.
• In Time division duplex mode only one frequency
is used for both uplink and downlink, but the
frequency is divided into time slots for uplink and
downlink communication

7. SERIVCE CLASSES IN UMTS
• In 3G network, ME will be able to establish multiple connections simultaneously.
• Network allows efficient cooperation between application with diverse quality of
service requirements.
• The quality can be defined by two main parameters
• Guaranteed and max bit rate possible(kbps)
• Permissible delay
• Based on the Qos criteria multimedia services has been further classified
1. Conversational: the most delay sensitive, e.g: application videos telepathy, VoIP.
2. Streaming: Flow which is steady and continuous, it is serve to user
3. Interactive: web browsing is an example.
4. Background: short messages, file transfer,

8. ARCHITECTURE OF UMTS

9. 1- USER EQUIPMENT
• It is not a simple mobile phone but rather, a mobile multimedia
terminal provides simultaneously voice, video and data services.
• UE is composed of two parts
-Mobile Equipment(ME)
-Universal subscriber identity module (USIM)
1.1 Mobile Equipment
It performs reliable data and signalling message transfer
throughout the radio Interface.
1.2 USIM
Information located in USIM are:
The personal identification Number(PIN), The user’s temporary
identities allocated, Circuit and packet switched temporary location
information, The codes to enable emergency call.

10. 2- UTRAN
• The UMTS(UMTS Terrestrial Radio Access network) has two elements:
i. RNC
ii. Node B.
• UTRAN is subdivided into individual radio network (RNS), where each RNS is
controlled by RNC.
• The RNC is connected to a set of Node B elements, each of which can serve one or
several cells

11. 3. CORE NETWORK
• The UMTS core network may be split into two different areas:
• Circuit switched elements:
Carry data in a circuit switched manner, i.e. a permanent channel for the duration of the
call.
• Packet switched elements:
Carry packet data. This enables much higher network usage as the capacity can be shared
and data is carried as packets which are routed according to their destination.

12. 3.1 CIRCUIT SWITCHED ELEMENTS
The circuit switched elements of the UMTS core network architecture include the
following network entities:
• Mobile switching center (MSC):
An exchange performing all the switching and signalling functions
Functions –call management –mobility management(handling attach and authentication) –
subscriber administration –maintenance of charging data(for radio network usage) –
supplementary call services (call forwarding, etc.)
• Gateway MSC (GMSC)
Provides interconnection between the UMTS core network and external PSTN/ISDN
networks

13. 3.2 PACKET SWITCHED ELEMENTS
The packet switched elements of the 3G UMTS core network architecture include the
following network entities:
• Serving GPRS Support Node (SGSN)
The SGSN provides a number of functions within the UMTS network architecture. Mobility
management , Session management, Interaction with other areas of the network, Billing.
• Gateway GPRS Support Node (GGSN):
Central element in UMTS. It handles inter-working between the UMTS packet switched
network and external packet switched networks.

14. MAJOR INTERFACE
• There are four major new interfaces defined in UMTS:
• Iu The interface between UTRAN and the CN
• Iur The Interface between different RNCs
• Iub The interface between the Node B and the RNC
• Uu The air interface

15. DIFFERENCE
UMTS
• UMTS is already 3G.
• It is mainly CDMA-based.
• There channels are divided into logical,
transport and physical based on where
they are used along with their
functions.
• Its frame duration is about 10ms.
• The modulation efficiency is 1.0 b/s/Hz.
• It has various bands from Band-I to
Band-VI, Each band specifies frequency
and UARFCN.
GSM
• GSM is 2G and 2.5G.
• It is typically based on TDMA.
• There channels are divided into traffic
channel and control channel based on
functionality of use in the system.
• Its frame duration is about 4.615ms.
• The modulation efficiency is 1.35
b/s/Hz.
• It has various bands, the major among
them are 850MHz, 900MHz, 1800MHz
and 1900MHz.

16. UMTS CHANNELS
There are three types of channels in UMTS:
• Logical channel
• Transport channel
• Physical channel

17. UMTS LOGICAL CHANNELS

18. UMTS TRANSPORT CHANNEL

19. UMTS PHYSICAL CHANNELS:
• Primary Common Control Physical Channel (PCCPCH) (downlink). This channel
continuously broadcasts system identification and access control information.
• Secondary Common Control Physical Channel (SCCPCH) (downlink) This channel carries
the Forward Access Channel (FACH) providing control information, and the Paging
Channel (PACH) with messages for UEs that are registered on the network.
• Dedicated Physical Data Channel (DPDCH) (up and downlink). This channel is used to
transfer user data.
• Dedicated Physical Control Channel (DPCCH) (up and downlink). This channel carries
control information to and from the UE. In both directions the channel carries bits and
the Transport Format Combination Identifier (TFCI). The downlink channel also includes
the Transmit Power Control and FeedBack Information (FBI) bits.
• Physical Random Access Channel (PRACH) (uplink). This channel enables the UE to
transmit random access bursts in an attempt to access a network.
• Physical Downlink Shared Channel (PDSCH) (downlink). This channel shares control
information to UEs within the coverage area of the node B.

20. THANKYOU